{"id":"CVE-2026-86731","state":"PUBLISHED","title":"Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController","description":"Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the mirror action actionDeactivateUser. As a result, an authenticated control panel user who is not an administrator but holds the administrateUsers permission can activate a pending or deliberately deactivated administrator account, which can lead to permission escalation when combined with resetting that account's password. The issue is fixed in Craft CMS 5.10.12.","publishedAt":"2026-09-08T15:14:01.558Z","updatedAt":"2026-09-19T14:21:56.253Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["craftcms cms"],"affected":[{"vendor":"craftcms","product":"cms","defaultStatus":"unaffected","versions":[{"version":"5.0.0-RC1","status":"affected","lessThan":"5.10.12","versionType":"semver"},{"version":"5.10.12","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/craftcms/cms/security/advisories/GHSA-jqf5-vfg6-8cx5","https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.12-permission-escalation-via-userscontroller"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86731.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86731","state":"PUBLISHED","datePublished":"2026-09-08T15:14:01.558Z","dateUpdated":"2026-09-19T14:21:56.253Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-08T11:31:09.013Z"},"containers":{"cna":{"title":"Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController","descriptions":[{"lang":"en","value":"Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the mirror action actionDeactivateUser. As a result, an authenticated control panel user who is not an administrator but holds the administrateUsers permission can activate a pending or deliberately deactivated administrator account, which can lead to permission escalation when combined with resetting that account's password. The issue is fixed in Craft CMS 5.10.12."}],"affected":[{"vendor":"craftcms","product":"cms","defaultStatus":"unaffected","versions":[{"version":"5.0.0-RC1","status":"affected","lessThan":"5.10.12","versionType":"semver"},{"version":"5.10.12","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-jqf5-vfg6-8cx5","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-jqf5-vfg6-8cx5)"},{"url":"https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.12-permission-escalation-via-userscontroller","name":"VulnCheck Advisory: Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"},"format":"CVSS"},{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-08T15:14:01.558Z"},"datePublic":"2026-08-25T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0.0","versionEndExcluding":"5.10.12"}]}]}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-86731","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-18T17:43:43.578474Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-19T14:21:56.253Z"}}]}}}